CN205714857U - A kind of antecurvature multiple wing type centrifugal blower fan - Google Patents
A kind of antecurvature multiple wing type centrifugal blower fan Download PDFInfo
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- CN205714857U CN205714857U CN201620377353.8U CN201620377353U CN205714857U CN 205714857 U CN205714857 U CN 205714857U CN 201620377353 U CN201620377353 U CN 201620377353U CN 205714857 U CN205714857 U CN 205714857U
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- spiral case
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Abstract
The utility model discloses a kind of antecurvature multiple wing type centrifugal blower fan, including spiral case and impeller；Described spiral case includes snail tongue, and the most tangent and that be smoothly connected the first curved surface, the second curved surface and the 3rd curved surface；Described impeller and described spiral case eccentric setting are used for making impeller diameter increase.This utility model increases impeller diameter by eccentrically mounted relative to spiral case for impeller, hence it is evident that promotes the parameters such as airflow pressure, reduces noise, blower fan surge will not occur, improve fan performance；Using three sections of cambered surfaces to constitute spiral case simultaneously and simplify spiral case inlet pressure, save spatial volume, version is simple, welding technique, and processing cost is low, makes spiral case manufacture convenient.
Description
Technical field
This utility model relates to air conditioner ventilation field, and a kind of antecurvature multiple wing type centrifugal blower fan is the suitableeest
For small-sized antecurvature multiple wing type double-suction centrifugal fan.
Background technology
Multiple wing type centrifugal ventilation blower has that discharge coefficient is big, pressure coefficient is high, size factor is little and noise is relatively low
Etc. advantage, it is widely used in air conditioner industry.Antecurvature multiple wing type centrifugal blower fan is the one of centrifugal fan, belongs to blade
Blower fan.Being mainly characterized by of this draught fan impeller uses impeller diameter ratio big (0.8 ~ 0.95), big (the 0.4 of impeller outer diameter of relative width
Times left and right) forward curved vane, and blade quantity a lot (32 ~ 64).Spiral case air inlet is that clearance-type coordinates with impeller, axially between
Gap value typically takes 0.02 ~ 0.025 times of impeller outer diameter.In multiple wing type centrifugal blower fan, generally use built-in motor, be in impeller
Central area, to save space.
This special construction of multiple wing type centrifugal blower fan makes its work characteristics be different from the ventilation blower of other form.It
Work efficiency relatively low, limit its range to a certain extent.For improving the efficiency of multiple wing type centrifugal blower fan, will
Tradition equal thickness list circular arc prismatic blade makes airfoil fan, trapezoid blade or twisted blade into, but determines rational prioritization scheme
Being not easily accomplished, and cause structure complexity, processing difficulties, high cost, practical value is little.
The Volute Design of idle call multiple wing type centrifugal blower fan can not quote method for designing and the experience number of industrial fan completely
According to, impeller overlaps with spiral case geometric center and is not necessarily best position, and conventional volute molded line is also not necessarily the most rational.So
And, the spiral case inwall molded line two-dimensional design that some research worker propose accordingly is theoretical, become helical angle design theory, seems again excessively
Complexity, operability is poor.
Therefore, prior art has yet to be improved and developed.
Utility model content
In view of above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of antecurvature multiple wing type centrifugal wind
Machine, eccentric setting impeller and spiral case, increase impeller diameter, use three sections of cambered surfaces to constitute spiral case and simplify centrifugal blower mechanism.
The technical solution of the utility model is as follows:
A kind of antecurvature multiple wing type centrifugal blower fan, including spiral case and impeller；
Described spiral case includes snail tongue, and the most tangent and that be smoothly connected the first curved surface, the second curved surface and
Three curved surfaces；
Described impeller and described spiral case eccentric setting are used for making impeller diameter D increase.
Further, in described antecurvature multiple wing type centrifugal blower fan, the impeller that described impeller is arranged concentrically with described spiral case is straight
Footpath is D, the impeller diameter D=1.1D of eccentric setting.
Further, in described antecurvature multiple wing type centrifugal blower fan, described impeller and the eccentricity value L=(D-D of described spiral case)/
2。
Further, in described antecurvature multiple wing type centrifugal blower fan, the impeller diameter ratio of described impeller is 0.85, the phase of described impeller
It is 0.75D to width.
Further, in described antecurvature multiple wing type centrifugal blower fan, the blade quantity of described impeller is 48.
Antecurvature multiple wing type centrifugal blower fan provided by the utility model, increases impeller by eccentrically mounted relative to spiral case for impeller
Diameter, centrifugal blower power increases with flow and rises always and can transship, hence it is evident that promotes the parameters such as airflow pressure, reduces noise,
Blower fan surge will not occur, improve fan performance；Use three sections of cambered surfaces to constitute spiral case simultaneously and simplify spiral case inlet pressure, save sky
Between volume, version is simple, welding technique, and processing cost is low, makes spiral case manufacture convenient.
Accompanying drawing explanation
Fig. 1 is tradition centrifugal fan structure schematic diagram without acceptance of persons.
Fig. 2 is the worm frame schematic diagram of tradition four arcs.
Fig. 3 is the structural representation of antecurvature multiple wing type centrifugal blower fan of the present utility model.
Fig. 4 is the structural representation of impeller in antecurvature multiple wing type centrifugal blower fan of the present utility model.
Fig. 5 is the blower fan Flow Field Distribution design sketch of antecurvature multiple wing type centrifugal blower fan of the present utility model.
Fig. 6 is the measured performance curve chart of antecurvature multiple wing type centrifugal blower fan of the present utility model.
Detailed description of the invention
This utility model provide a kind of antecurvature multiple wing type centrifugal blower fan, for make the purpose of this utility model, technical scheme and
Effect is clearer, clear and definite, referring to the drawings and give an actual example to this utility model further describe.Should be appreciated that this
Specific embodiment described by place, only in order to explain this utility model, is not used to limit this utility model.
As it is shown in figure 1, Fig. 1 is tradition centrifugal fan structure schematic diagram without acceptance of persons, the effect of the spiral case 1 of centrifugal blower is
The gas concentration of impeller 2, water conservancy diversion will be left, and the part kinetic energy diffusion of gas is changed into static pressure.If spiral case 1 inwall molded line
It is improper to design, and kinetic energy rejection and noise will increase, when centrifugal blower off-design operating mode is run especially seriously, and impeller 2 straight
Footpath is D.Impeller 2 center of rotation of tradition conventional centrifugal blower fan is consistent with spiral case 1 Ji Fang center, installs the most with one heart, in its geometry
The heart overlaps.Spiral case 1 molded line of tradition conventional centrifugal blower fan is formed by four arcs approximation, it is common that equilateral base side or inequilateral base
Side.As in figure 2 it is shown, the radius of four arcs is respectively R1 ', R2 ', R3 ' and R4 '.This utility model mentality of designing is based on guarantee
On the premise of fan performance does not reduces, optimize blower fan structure, abbreviated volute 1 molded line.Will spiral case 1 inwall molded line by traditional four
Section cambered surface is reduced to three sections of tangent cambered surfaces, and spiral case 1 size is more or less the same, and structure is relatively simple, and manufactures convenient.
Referring to Fig. 3, the antecurvature multiple wing type centrifugal blower fan that this utility model provides, including spiral case 1 and impeller 2；With existing
Technology is compared, and the diameter of impeller 2 is increased to D ', and the spiral case 1 described in this utility model includes first its radius of curved surface 3(
For R1), second its radius of curved surface 4(be R2) and the 3rd its radius of curved surface 5(be R3) and snail tongue, described first bending
The surface of surface the 3, second curved surface 4 and the 3rd bending 5 is the most tangent and is smoothly connected, and uses three sections of cambered surfaces to constitute spiral case 1
Simplify spiral case 1 molded line, simplify the spiral case 1 of tradition four arcs approximation molding, make spiral case 1 manufacture convenient, parts
Manufacture, by mould molding, has welding technique, easily manufactured, the advantage that processing cost is low.
Refer to spiral case 1 structural representation that Fig. 2, Fig. 2 are tradition four arcs, the spiral case 1 of tradition conventional centrifugal blower fan
Molded line is formed by four arcs approximation, it is common that equilateral base side or inequilateral base side.Impeller 2 is that blower fan finally connects with gas medium
The parts touched and do work it, the main structure parameters of draught fan impeller includes impeller outer diameter, impeller width, inside and outside impeller diameter ratio, leaf
Sheet imports and exports setting angle, blade quantity etc., and parameters all can produce impact to fan performance.
According to blower fan similar law, air quantity becomes cube relation with impeller diameter, and blast becomes quadratic power with impeller diameter
Relation, it is seen that impeller diameter is big on the impact of fan performance.But because of some actual demands, blower fan overall dimensions is limited, can not
Increase.In the case of fan performance is ungratified, if increasing impeller diameter, spiral case size but can not synchronize to amplify, and i.e. selects same
The big plane No. blower fan of series is inadvisable.If directly amplifying impeller diameter, snail tongue room will be caused too small, efficiency declines, and noise increases
Greatly, because spiral case inner space is limited, such scheme also can not be implemented.
As it is shown on figure 3, the technical scheme increasing impeller diameter that this utility model proposes based on above-mentioned technical problem is: will
Described impeller 2 in centrifugal blower and described spiral case 1 eccentric setting, increase for making impeller 2 diameter D.In this utility model
Impeller 2 is equipped with certain bias with the installation position of spiral case 1, it is ensured that the overall dimensions of centrifugal blower and snail tongue room；I.e. impeller 2 to
Spiral case 1 offset inboard is to increase impeller 2 diameter, and the increase of impeller 2 diameter can be obviously improved the performance parameters such as airflow pressure, make wind
Engine efficiency is improved, and reduces noise level, improves fan performance.
Concrete, as shown in figures 1 and 3, impeller 2 diameter when impeller 2 and the spiral case 1 of conventional centrifugal blower fan are arranged concentrically
For D, after centrifugal blower fan blade wheel 2 of the present utility model and spiral case 1 eccentric setting, the impeller 2 diameter D=1.1D of eccentric setting；Leaf
Wheel 2 and the eccentricity value L=(D-D of spiral case 1)/2.Centrifugal blower overall dimensions can keep constant, and the form of blade is without repairing
Change, the performance of centrifugal blower can be improved.
Further, as an embodiment of the present utility model, as shown in Figure 3 and Figure 4, this utility model arranges described
The impeller diameter ratio of impeller 2 is 0.85, and the relative width arranging described impeller 2 is 0.75D, and the blade quantity of described impeller 2 is 48.Tool
There is the centrifugal blower of above technical characteristic, the performance parameters such as airflow pressure can be obviously improved, make centrifugal blower efficiency be improved,
And reduce the noise level of centrifugal blower.
The blade of described impeller 2 is set to equal thickness list circular arc prismatic blade, and making described blade is blade-like.
Refer to the blower fan Flow Field Distribution effect that Fig. 5 and Fig. 6, Fig. 5 are antecurvature multiple wing type centrifugal blower fan of the present utility model
Figure.In figure, air-flow enters into inside centrifugal blower from centrifugal blower both sides air inlet, through impeller 2 high speed rotating, does work it,
Be transported to assigned work region by air outlet again, can visual understanding to blower interior fluid flow, fluid density is big, and stream
Efficiency of movement is the highest.Fig. 6 is the measured performance curve chart of antecurvature multiple wing type centrifugal blower fan of the present utility model.In figure four curves from
The most respectively: efficiency flow curve, power flow curve, total head pressure flux curve and static flow curve.Can
Finding out, the highest static pressure efficiency of centrifugal blower of the present utility model reaches 30%, in the case of antecurvature multiple wing field, electric machine built-in, and phase
To well；Power increases with flow and rises always, can transship；Pressure curve is shallower, and hump is inconspicuous, and blower fan will not be occurred to breathe heavily
Shake；Reduce noise level in the case of being obviously improved the performance parameters such as airflow pressure, improve fan performance.
In sum, antecurvature multiple wing type centrifugal blower fan provided by the utility model, impeller is eccentrically mounted relative to spiral case
Increasing impeller diameter, centrifugal blower power increases with flow and rises always and can transship, hence it is evident that promote the parameters such as airflow pressure, fall
Low noise, will not occur blower fan surge, improve fan performance；Use three sections of cambered surfaces to constitute spiral case simultaneously and simplify volute type
Line, saves spatial volume, and version is simple, welding technique, and processing cost is low, makes spiral case manufacture convenient.
It should be appreciated that application of the present utility model is not limited to above-mentioned citing, those of ordinary skill in the art are come
Saying, can be improved according to the above description or convert, such as, all these modifications and variations all should belong to this utility model institute
Attached scope of the claims.
Claims (5)
1. an antecurvature multiple wing type centrifugal blower fan, it is characterised in that include spiral case and impeller；
Described spiral case includes snail tongue, and the most tangent and that be smoothly connected the first curved surface, the second curved surface and the 3rd are curved
Curved surface；
Described impeller and described spiral case eccentric setting, the impeller diameter after eccentric setting is more than the impeller diameter being arranged concentrically.
Antecurvature multiple wing type centrifugal blower fan the most according to claim 1, it is characterised in that described impeller is concentric with described spiral case
The impeller diameter arranged is D, the impeller diameter D=1.1D of eccentric setting.
Antecurvature multiple wing type centrifugal blower fan the most according to claim 2, it is characterised in that described impeller is inclined with described spiral case
Center value L=(D-D)/2.
Antecurvature multiple wing type centrifugal blower fan the most according to claim 3, it is characterised in that the impeller diameter ratio of described impeller is
0.85, the relative width of described impeller is 0.75D.
Antecurvature multiple wing type centrifugal blower fan the most according to claim 4, it is characterised in that the blade quantity of described impeller is
48。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620377353.8U CN205714857U (en) | 2016-04-29 | 2016-04-29 | A kind of antecurvature multiple wing type centrifugal blower fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620377353.8U CN205714857U (en) | 2016-04-29 | 2016-04-29 | A kind of antecurvature multiple wing type centrifugal blower fan |
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| CN205714857U true CN205714857U (en) | 2016-11-23 |
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| CN201620377353.8U Active CN205714857U (en) | 2016-04-29 | 2016-04-29 | A kind of antecurvature multiple wing type centrifugal blower fan |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715570A (en) * | 2016-04-29 | 2016-06-29 | 上海诺地乐通用设备制造有限公司 | Forward-curved multi-wing type centrifugal fan |
| CN113221484A (en) * | 2021-06-02 | 2021-08-06 | 上海宝钢节能环保技术有限公司 | Rapid selection method, device and equipment for in-service remanufacturing design scheme of fan |
-
2016
- 2016-04-29 CN CN201620377353.8U patent/CN205714857U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715570A (en) * | 2016-04-29 | 2016-06-29 | 上海诺地乐通用设备制造有限公司 | Forward-curved multi-wing type centrifugal fan |
| CN113221484A (en) * | 2021-06-02 | 2021-08-06 | 上海宝钢节能环保技术有限公司 | Rapid selection method, device and equipment for in-service remanufacturing design scheme of fan |
| CN113221484B (en) * | 2021-06-02 | 2022-11-11 | 上海宝钢节能环保技术有限公司 | Rapid selection method, device and equipment for in-service remanufacturing design scheme of fan |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201806 Shanghai city Jiading District qingneng Road No. 55 Patentee after: Yingfei Tongren fan Co., Ltd Address before: 201806 Shanghai city Jiading District qingneng Road No. 55 Patentee before: SHANGHAI NAUTILUS GENERAL EQUIPMENT MANUFACTURING Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |